The annual CASI Plenary meeting is the main discussion and decision-making body of the FAI Air Sport General Commission (in French, Commission d'Aéronautique Sportive Internationale or CASI). CASI is constituted by and operates under the parts of the FAI Constitution (the Statutes and By-Laws) that refer to it. The CASI Bureau is responsible for arranging business, consulting and taking decisions as required between Plenaries.

Between Plenaries, any significant matter relevant to CASI that comes to the notice of the Bureau, will be discussed by the Bureau, documented and circulated to CASI members, the FAI Secretariat, and appropriate experts in the matter concerned, by the person nominated by the President to deal with the matter. The transmission method will normally be by email and the action person will normally be a Bureau member, or, exceptionally, a systems expert in the subject area, depending on the nature of the matter in question.

• Information. The only exception to a general circulation of information will be for subjects that are deemed by the Bureau to be sensitive, such as those involving legal, disciplinary or personal matters, information on which will be restricted to the Bureau and others judged as essential to be involved.
  
  
• Proposals for discussion, changes and decisions. A deadline will be given for replies, normally of one calendar month after initial notification. After receipt of replies, the Bureau will take any decisions that appear to be necessary, and these will be confirmed or otherwise at the next Plenary. The Bureau will take account of a simple majority of CASI members expressing an opinion (normally by email) on the matter in question. See also para 3 on Powers of the Bureau.

Individual CASI members or systems experts may be nominated by the Plenary or the Bureau for specific work or projects. Their powers on behalf of CASI are limited to those needed to prepare the work.

• Preparation of papers. Papers on specific subjects may be prepared for CASI discussion and decision. An example was the paper on incidents and accidents during sporting events, prepared and approved by CASI and now available as an FAI advisory document to competition organisers. Others are papers for inclusion as annexes to the agendas of CASI meetings.
  
  
• Editors of CASI documents. Some documents are of a semi-permanent nature but require regular updates that are co-ordinated by an editor nominated by CASI. An example is the Jury Members Handbook for which a permanent editor is appointed.

Matters concerning the constitution or operation of CASI require decisions by the CASI Plenary meeting and/or by those responsible for the FAI Constitution (Statutes and By-Laws). The Bureau shall ensure that other issues requiring advice or decision are documented and circulated, normally by email, to CASI Delegates (and to the Secretariat and technical experts where relevant) who will be given a minimum of one calendar month to reply. The Bureau will then consider the position and circulate their proposed solution before any action is taken. If safety issues are concerned, a shorter timescale is allowed.

• Report to CASI Plenary on Bureau activities. A report on matters that have arisen and decisions that have been taken during the year will be made by the President to the Plenary following.